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Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

Palo Alto NetworksCVE-2026-0279

Palo Alto Networks PAN-OS: cross-site scripting

Palo Alto Networks

CVE-2026-0279 · Published Jul 9, 2026 · updated Aug 11, 2026

Low1.3
Fix: upgrade to 12.1.8 or later (4 fixed versions below)
Palo Alto Networks advisory

Multiple cross site scripting vulnerabilities in the User-ID™ Authentication Portal (aka Captive Portal) service, GlobalProtect™ gateway/portal features and Clientless VPN of Palo Alto Networks PAN-OS® software enables a malicious unauthenticated user to store or execute malicious JavaScript payload.

The security risk posed by this issue is minimized when the management interface and access to the User-ID™ Authentication Portal is restricted to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 .

This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series).

Cloud NGFW is not affected by this vulnerability.

Affected versions

PackageAffectedFixed in
PAN-OS
Product
>= 12.1.0, < 12.1.812.1.8
>= 11.2.0, < 11.2.1311.2.13
>= 11.1.0, < 11.1.1611.1.16
>= 10.2.0, < 10.2.18-h810.2.18-h8
Prisma Access
Product
>= 12.1.0, < 12.1.812.1.8
<= 11.2.0No fix yet
<= 10.2.0No fix yet
Details and references
CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:D/RE:M/U:Amber
Severity from
the vendor (its own CVE record or advisory)
Weakness
CWE-79

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